Improvement in drawing-frames



anni than.

GEORGE DRAPER, OF HOPEDALE, MASSACHUSETTS.

Letters Patent No. 110,556, datedlflecember 27, 1870.

IMPROVEMENT Vm DRAWING-FRAMES.

The Schedule referred to in these Letters Patent and' making part of the `same.

tion and re )resented in the accom )an infr drawing of l v n :n

which- Figure 1 denotes a side elevation of what is hereinafter termed the reinforce, and those portions of a drawing-regulator to whichit is applied and with which it immediately operates; the nature of my invention consisting in the combination of such reinforce, or its equivalent, and the drawing regulator.

Figure 2 is a vertical section of such reinforce.

Figure 3 is a'top View of the machine, or parts of a drawing-regulator, to which the reinforce is "appli cable; they constituting portions of the well-known Wyllys drawing-regulator. l

In this drawing-regulator a vibratory trumpet is employed, with a mechanism usually termed anv evener,7 the whole operating to change the draft of the drawing-rollers of the spinning-machine, as the thickness of the sliver in the trumpet may either' increase or diminish relatively to the standard of thickness.

Such a Vibrator-y trumpet is described in Pray and Stafords patent of November 12, 1846. It is also shown in the drawing-regulator patented by Whiting Hayden, March l2, 1850. Also, in a moditied'form, in that patented by Newell Wyllys on January 28, 1851, such patent having been reissued on JulylZ, 1864, and since extendedfor a'further term ot" seven years. For like purposes such a trumpet has been used in other machines. In most, if not in all cases, except in the VVyllys drawing-regulator, the trumpet has been subjected to the action of' a weight, or its equivalent, operating against the pressure or draft of the sliver upon the trumpet, and with the same, or nearlythe same force, whether the trumpet be pressed to itsl extreme of forward motion., or,in consequence of the sliver being of 'not sufficient thickness, being allowed to fall back to its other extreme of .motion or to any position between the two. A

The object of my invention is to produce a sliver of even thickness, and thus insure a threadof even diameter, or a better approximation'thereto than usually results'from the patented mechanisms to which reference has hereinbefore been made.

It must be borne in mind that the distance of vibra tion of a trumpet cf a draft-regulator is confined to about the length of the staple of the cotton or fibrous material, because there has to be such a. degree of condensation of the sliver in the trumpet as would .cause the sliverv to pull apart were the month' of the trumpet. at a distance from the bite of the calenderrollers greater tlian the length of the staple. In most casest-he extent of vibration of the trumpet, when in action on a 'cotton-sliver, will. not exceed threefourths of an inch.

Though in Wyllys regulator the trumpet .turns on a pivot and is mounted on a vibratory arm, suchgan arrangement of 'the trumpet fails, in'practice', to overcome the ditliculty, .which 'it is the purpose of my invention to prevent. Although VVyllys draft-regulator has gone into very extensive use, his mode of supporting and operating the trumpet has mostly been abandoned and others substituted.

VVitlrthe vibrator-y.trumpetnow in general use the weight operates with nearly equal force in whatever position the trumpet maybe within its limits of mos tion, the sliver, when of the right size or thickness, causing' the trumpet to assume its medial position, the mechanism for changing the relative speed of the draftrollers being at rest.

Then the sliver in the trumpet is too large or thick it will overcome the resistance ofthe weight and press the trumpet forward, land set at work the evener or lmechanism so as to increase the draft until the sliver maybe properly reduced.

So when the sliver'in the trumpet may be too small or-not of suiicient thicknessthe weight will effect a retraction ofthe trumpet, andset the mechanism at workto lessen the draft, so as to increase the size or thickness of the sliver.

Such is the theoretical action of the parts, but, in practice, when the size of the sliver is increased, owing to the condensed condition of the cotton in the trumpet, the latter will he pressed or drawn forward toward the calender-rollers, often with great power, and there kept, the mechanism to change the draft of the sliver operating to its full capacity, until the sliver becomes too small, in which case the effect will be to let the trumpet fall back pastthe medial position, the

results being an uneven sliver. When the sliver is too light the power to change the trumpet is much less in proportion; consequently, when at its extreme position, it will not stay too long as it will when at its forward extreme, for as soon as the trumpet may become full it will move forward with the sliver., Greater trouble comes from making the sliver lighter rather than heavier, with respect to the standard size, for if heavier there is a waste of stock, which may result in a slight imperfection not detrimental to the strength ofthe fabric; butin case the sliver is not thick enough the thread or yarn made from it will he too fine, and, as a consequence,y its strength will be proportionally impaired. Having less fiber the thread or yarn will require more twistl to impart to it the necessary strength; there fore a sliver when made too small will produce animperfection in the woven. fabric made of it.

In order to prevent the sliver, when too large, from keeping the trumpet drawn forward too longI employ'- The slide-weight of the lever is shown at g, as pro# vided with a set-screw, 7L.

O and D are the calender-rollers.

E E and F F, the sets of draft-rollers. i

G, the vibratory arm, carrying the two pawls i 7c to operate with the gear Z.

H is the Banged disk or rocker-plate, arranged asid of the gear, and connected with the weighted arm e byla connection-rod, m, pivoted to the arm, and to' a crank-pin proj ccting from the said rockerplat.e, all the several parts above mentioned and referred to, with the exception of the reinforce, beingrwell-lmown portions of a draft'regulator of the kind mentioned asin common use, the remaining parts of the regulator not being exhibited, as they are or will be well understood byV persons skilled in the art to which' my invention appertains. v

'.lhesaid reinforce is to be arranged so as not to come into operation on or be met by the weighted arm until thetrumpet in advancing may have just passed its medial position. p The eect of the reinforce is to prevent the trumpet from staying fully forward until the sliver may be rendered too small. ,As soon as the trumpet in ay advance beyond its medial position its weighted arm will he raised up against the lower end of the slide-rod of the reinforce and be estopped by the action of the spring connected .at its lower end with suc-h rod, and at its upper end supported against the top of the casein which such spring is situated.

I have contemplated other ways of making a reinforce and applying it to the trumpet or its lever. It may be like a common spring or a spring-balance attached to the trumpet-lever and the supporting-flame, or it may be composed of a slide-rod pendent from the lev'er and provided 'with a shoulder or headfat its lower end,`

and arranged to extend through a series of weights disposed on a platform, so that, on the rod being elevated by the lever` such weights may be lifted successivoly. All such may be viewed as different methods of carrying out my invention or applying to a draft-regulator of a spinning-machine a. reinforce to produce the desired effect, as hereinbetbre set forth.

I prefer the reinibrce as represented, because I have discovered that a sliver, when too coarse, operates the draft-regulator differently, and requires different treatment from what is the case when the sliver is too fine. First, lessharm results from the sliver when too coarse ythan follows when it is-Atoo flue. j Second, when it is too coarse it is sure, without the reinforce combined with the draft-regulator, to be reduced too much before the operation of' reduction may cease; whereas, for reasons hitherto given, such is not the case where the sliver is too nc.

With my invention the draft-regulator is allowed to operate freely, when the sliver may beV too light, the movement ot' changing the draft being hindered and obstructed only when the sliver may be too heavy, (except when-very much so,) such amount of reinforcement or resistance being employed as may be necessary to prevent over action when the sliver may be too heavy. \Vith my invention practice has demonstrated that an even or muchbetter sliver can be produced.

Suppose, when the standard size for the sliver is one hundred grains to the yard, the sliver, by the addition of a card, cmes to the trumpet with a size correspending to one hundred and ten grains to the yard, theeifect would be to instantly press the trumpet forward to its extreme point in spite of the elastic reinforce, thus causing the draft-changing mechanism to operate to its full capacity until thesliver may be reduced toperhaps one hundred and two grains per yard, when the reinforce or expansive power thereof coming Y into action with the weight of the trumpet-lever will gradually depress the said lever and return the trumpet to its medial position, when the sliver may have attained its proper size.

I claim- The combination of the reinforce with the sliver draft-regulator, all being substantially as described. GEORGE DRAPER.

Witnesses R. H. EDDY, S. N. PrPEn.

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